18
8026957/AE00/V1-0/2021-08| SICKOPERATING INSTRUCTIONS | DUSTHUNTER SB30
Subject to change without notice
2 PRODUCT DESCRIPTION
2.2.3 Optional external purge air unit
The MCU control unit with integrated purge air supply cannot be used when the internal
duct pressure is greater than +2 hPa. Use the optional external purge air unit in this case. It
has a powerful blower and can be used for excess pressure in the duct up to 30 hPa. The
scope of delivery includes a purge air hose with 40 mm nominal diameter (length 5 m or
10 m).
Fig. 8: Optional external purge air unit
A weather hood is available for use outdoors (see “Weather hoods”, page 69).
2.2.4 Voltage and purge air supply
2.2.5 Installation accessories
Separate parts of the measuring system (order separately) are:
● Purge air hose, nominal diameter 40 mm, for purge air supply to the sender/receiver
unit via the MCU-P control unit.
● Connection line from the MCU to the sender/receiver unit.
Weather hood
A weather hood is available when using the sender/receiver unit outdoors (see “Weather
hoods”, page 69).
Air filter
Cover cap with opening (part of the purge air
reduction)
Blower (standard type 2BH13)
Purge air hose
Base plate
To purge air connection of sender/receiver unit
Internal duct
pressure
[hPa ]
Connection and supply components
Purge air Voltage
-50 ... +2
MCU-P + purge air hose DN40
-50... +30
Optional external purge air unit
MCU-N
We recommend using the optional external purge air unit when the sender/receiver unit
is more than 10 m away from the MCU control unit.
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